Update app.py

app.py

@@ -44,7 +44,7 @@ with gr.Blocks() as demo:
             bot_message = "Hm, I don't see any document text, please paste in the box on the left."
         else:    
             query_bot = query_model({"inputs": {"question": message, "context": context}})
-            if(len(query_bot)):
+            if(len(query_bot) and ("answer" in query_bot)):
                 bot_message = query_bot['answer']
             else:
                 bot_message = "I'm having trouble with this question, please try again."